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High-speed steel (HSS) twist drills #HSSDRILLBITS typically undergo quality inspection. The inspection process involves several stages to ensure the product meets quality standards and customer requirements. The quality inspection may include the following aspects:

Dimensional Accuracy Inspection: Metrology equipment is used to check whether the drill's diameter, length, and cutting angles meet the specified requirements.

Hardness Testing: The hardness of the high-speed steel is tested to ensure it can maintain adequate cutting performance during machining.

Surface Treatment Inspection: The quality of the drill's surface finish and coatings (such as titanium coatings) is checked to meet standards.

Concentricity Inspection: Ensuring the drill remains concentric during rotation to avoid deviations that could affect machining accuracy.

Toughness and Anti-Fracture Performance Testing: Experiments are conducted to verify the drill's durability and resistance to breakage under high-stress conditions.